USB: musb: Populate the VBUS GPIO with the correct GPIO number
[linux-2.6.git] / drivers / usb / c67x00 / c67x00-hcd.c
1 /*
2  * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
3  *
4  * Copyright (C) 2006-2008 Barco N.V.
5  *    Derived from the Cypress cy7c67200/300 ezusb linux driver and
6  *    based on multiple host controller drivers inside the linux kernel.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
21  * MA  02110-1301  USA.
22  */
23
24 #include <linux/device.h>
25 #include <linux/platform_device.h>
26 #include <linux/usb.h>
27
28 #include "c67x00.h"
29 #include "c67x00-hcd.h"
30
31 /* --------------------------------------------------------------------------
32  * Root Hub Support
33  */
34
35 static __u8 c67x00_hub_des[] = {
36         0x09,                   /*  __u8  bLength; */
37         0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
38         0x02,                   /*  __u8  bNbrPorts; */
39         0x00,                   /* __u16  wHubCharacteristics; */
40         0x00,                   /*   (per-port OC, no power switching) */
41         0x32,                   /*  __u8  bPwrOn2pwrGood; 2ms */
42         0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
43         0x00,                   /*  __u8  DeviceRemovable; ** 7 Ports max ** */
44         0xff,                   /*  __u8  PortPwrCtrlMask; ** 7 ports max ** */
45 };
46
47 static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
48 {
49         struct c67x00_hcd *c67x00 = sie->private_data;
50         unsigned long flags;
51
52         c67x00_ll_husb_reset(sie, port);
53
54         spin_lock_irqsave(&c67x00->lock, flags);
55         c67x00_ll_husb_reset_port(sie, port);
56         spin_unlock_irqrestore(&c67x00->lock, flags);
57
58         c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
59 }
60
61 static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
62 {
63         struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
64         struct c67x00_sie *sie = c67x00->sie;
65         u16 status;
66         int i;
67
68         *buf = 0;
69         status = c67x00_ll_usb_get_status(sie);
70         for (i = 0; i < C67X00_PORTS; i++)
71                 if (status & PORT_CONNECT_CHANGE(i))
72                         *buf |= (1 << i);
73
74         /* bit 0 denotes hub change, b1..n port change */
75         *buf <<= 1;
76
77         return !!*buf;
78 }
79
80 static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
81                               u16 wIndex, char *buf, u16 wLength)
82 {
83         struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
84         struct c67x00_sie *sie = c67x00->sie;
85         u16 status, usb_status;
86         int len = 0;
87         unsigned int port = wIndex-1;
88         u16 wPortChange, wPortStatus;
89
90         switch (typeReq) {
91
92         case GetHubStatus:
93                 *(__le32 *) buf = cpu_to_le32(0);
94                 len = 4;                /* hub power */
95                 break;
96
97         case GetPortStatus:
98                 if (wIndex > C67X00_PORTS)
99                         return -EPIPE;
100
101                 status = c67x00_ll_usb_get_status(sie);
102                 usb_status = c67x00_ll_get_usb_ctl(sie);
103
104                 wPortChange = 0;
105                 if (status & PORT_CONNECT_CHANGE(port))
106                         wPortChange |= USB_PORT_STAT_C_CONNECTION;
107
108                 wPortStatus = USB_PORT_STAT_POWER;
109                 if (!(status & PORT_SE0_STATUS(port)))
110                         wPortStatus |= USB_PORT_STAT_CONNECTION;
111                 if (usb_status & LOW_SPEED_PORT(port)) {
112                         wPortStatus |= USB_PORT_STAT_LOW_SPEED;
113                         c67x00->low_speed_ports |= (1 << port);
114                 } else
115                         c67x00->low_speed_ports &= ~(1 << port);
116
117                 if (usb_status & SOF_EOP_EN(port))
118                         wPortStatus |= USB_PORT_STAT_ENABLE;
119
120                 *(__le16 *) buf = cpu_to_le16(wPortStatus);
121                 *(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
122                 len = 4;
123                 break;
124
125         case SetHubFeature:     /* We don't implement these */
126         case ClearHubFeature:
127                 switch (wValue) {
128                 case C_HUB_OVER_CURRENT:
129                 case C_HUB_LOCAL_POWER:
130                         len = 0;
131                         break;
132
133                 default:
134                         return -EPIPE;
135                 }
136                 break;
137
138         case SetPortFeature:
139                 if (wIndex > C67X00_PORTS)
140                         return -EPIPE;
141
142                 switch (wValue) {
143                 case USB_PORT_FEAT_SUSPEND:
144                         dev_dbg(c67x00_hcd_dev(c67x00),
145                                 "SetPortFeature %d (SUSPEND)\n", port);
146                         len = 0;
147                         break;
148
149                 case USB_PORT_FEAT_RESET:
150                         c67x00_hub_reset_host_port(sie, port);
151                         len = 0;
152                         break;
153
154                 case USB_PORT_FEAT_POWER:
155                         /* Power always enabled */
156                         len = 0;
157                         break;
158
159                 default:
160                         dev_dbg(c67x00_hcd_dev(c67x00),
161                                 "%s: SetPortFeature %d (0x%04x) Error!\n",
162                                 __func__, port, wValue);
163                         return -EPIPE;
164                 }
165                 break;
166
167         case ClearPortFeature:
168                 if (wIndex > C67X00_PORTS)
169                         return -EPIPE;
170
171                 switch (wValue) {
172                 case USB_PORT_FEAT_ENABLE:
173                         /* Reset the port so that the c67x00 also notices the
174                          * disconnect */
175                         c67x00_hub_reset_host_port(sie, port);
176                         len = 0;
177                         break;
178
179                 case USB_PORT_FEAT_C_ENABLE:
180                         dev_dbg(c67x00_hcd_dev(c67x00),
181                                 "ClearPortFeature (%d): C_ENABLE\n", port);
182                         len = 0;
183                         break;
184
185                 case USB_PORT_FEAT_SUSPEND:
186                         dev_dbg(c67x00_hcd_dev(c67x00),
187                                 "ClearPortFeature (%d): SUSPEND\n", port);
188                         len = 0;
189                         break;
190
191                 case USB_PORT_FEAT_C_SUSPEND:
192                         dev_dbg(c67x00_hcd_dev(c67x00),
193                                 "ClearPortFeature (%d): C_SUSPEND\n", port);
194                         len = 0;
195                         break;
196
197                 case USB_PORT_FEAT_POWER:
198                         dev_dbg(c67x00_hcd_dev(c67x00),
199                                 "ClearPortFeature (%d): POWER\n", port);
200                         return -EPIPE;
201
202                 case USB_PORT_FEAT_C_CONNECTION:
203                         c67x00_ll_usb_clear_status(sie,
204                                                    PORT_CONNECT_CHANGE(port));
205                         len = 0;
206                         break;
207
208                 case USB_PORT_FEAT_C_OVER_CURRENT:
209                         dev_dbg(c67x00_hcd_dev(c67x00),
210                                 "ClearPortFeature (%d): OVER_CURRENT\n", port);
211                         len = 0;
212                         break;
213
214                 case USB_PORT_FEAT_C_RESET:
215                         dev_dbg(c67x00_hcd_dev(c67x00),
216                                 "ClearPortFeature (%d): C_RESET\n", port);
217                         len = 0;
218                         break;
219
220                 default:
221                         dev_dbg(c67x00_hcd_dev(c67x00),
222                                 "%s: ClearPortFeature %d (0x%04x) Error!\n",
223                                 __func__, port, wValue);
224                         return -EPIPE;
225                 }
226                 break;
227
228         case GetHubDescriptor:
229                 len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
230                 memcpy(buf, c67x00_hub_des, len);
231                 break;
232
233         default:
234                 dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
235                 return -EPIPE;
236         }
237
238         return 0;
239 }
240
241 /* ---------------------------------------------------------------------
242  * Main part of host controller driver
243  */
244
245 /**
246  * c67x00_hcd_irq
247  *
248  * This function is called from the interrupt handler in c67x00-drv.c
249  */
250 static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
251 {
252         struct c67x00_hcd *c67x00 = sie->private_data;
253         struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
254
255         /* Handle sie message flags */
256         if (msg) {
257                 if (msg & HUSB_TDListDone)
258                         c67x00_sched_kick(c67x00);
259                 else
260                         dev_warn(c67x00_hcd_dev(c67x00),
261                                  "Unknown SIE msg flag(s): 0x%04x\n", msg);
262         }
263
264         if (unlikely(hcd->state == HC_STATE_HALT))
265                 return;
266
267         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
268                 return;
269
270         /* Handle Start of frame events */
271         if (int_status & SOFEOP_FLG(sie->sie_num)) {
272                 c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
273                 c67x00_sched_kick(c67x00);
274                 set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
275         }
276 }
277
278 /**
279  * c67x00_hcd_start: Host controller start hook
280  */
281 static int c67x00_hcd_start(struct usb_hcd *hcd)
282 {
283         hcd->uses_new_polling = 1;
284         hcd->state = HC_STATE_RUNNING;
285         hcd->poll_rh = 1;
286
287         return 0;
288 }
289
290 /**
291  * c67x00_hcd_stop: Host controller stop hook
292  */
293 static void c67x00_hcd_stop(struct usb_hcd *hcd)
294 {
295         /* Nothing to do */
296 }
297
298 static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
299 {
300         struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
301         u16 temp_val;
302
303         dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
304         temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
305         temp_val &= HOST_FRAME_MASK;
306         return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
307 }
308
309 static struct hc_driver c67x00_hc_driver = {
310         .description    = "c67x00-hcd",
311         .product_desc   = "Cypress C67X00 Host Controller",
312         .hcd_priv_size  = sizeof(struct c67x00_hcd),
313         .flags          = HCD_USB11 | HCD_MEMORY,
314
315         /*
316          * basic lifecycle operations
317          */
318         .start          = c67x00_hcd_start,
319         .stop           = c67x00_hcd_stop,
320
321         /*
322          * managing i/o requests and associated device resources
323          */
324         .urb_enqueue    = c67x00_urb_enqueue,
325         .urb_dequeue    = c67x00_urb_dequeue,
326         .endpoint_disable = c67x00_endpoint_disable,
327
328         /*
329          * scheduling support
330          */
331         .get_frame_number = c67x00_hcd_get_frame,
332
333         /*
334          * root hub support
335          */
336         .hub_status_data = c67x00_hub_status_data,
337         .hub_control    = c67x00_hub_control,
338 };
339
340 /* ---------------------------------------------------------------------
341  * Setup/Teardown routines
342  */
343
344 int c67x00_hcd_probe(struct c67x00_sie *sie)
345 {
346         struct c67x00_hcd *c67x00;
347         struct usb_hcd *hcd;
348         unsigned long flags;
349         int retval;
350
351         if (usb_disabled())
352                 return -ENODEV;
353
354         hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
355         if (!hcd) {
356                 retval = -ENOMEM;
357                 goto err0;
358         }
359         c67x00 = hcd_to_c67x00_hcd(hcd);
360
361         spin_lock_init(&c67x00->lock);
362         c67x00->sie = sie;
363
364         INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
365         INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
366         INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
367         INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
368         c67x00->urb_count = 0;
369         INIT_LIST_HEAD(&c67x00->td_list);
370         c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
371         c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
372         c67x00->max_frame_bw = MAX_FRAME_BW_STD;
373
374         c67x00_ll_husb_init_host_port(sie);
375
376         init_completion(&c67x00->endpoint_disable);
377         retval = c67x00_sched_start_scheduler(c67x00);
378         if (retval)
379                 goto err1;
380
381         retval = usb_add_hcd(hcd, 0, 0);
382         if (retval) {
383                 dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
384                         __func__, retval);
385                 goto err2;
386         }
387
388         spin_lock_irqsave(&sie->lock, flags);
389         sie->private_data = c67x00;
390         sie->irq = c67x00_hcd_irq;
391         spin_unlock_irqrestore(&sie->lock, flags);
392
393         return retval;
394
395  err2:
396         c67x00_sched_stop_scheduler(c67x00);
397  err1:
398         usb_put_hcd(hcd);
399  err0:
400         return retval;
401 }
402
403 /* may be called with controller, bus, and devices active */
404 void c67x00_hcd_remove(struct c67x00_sie *sie)
405 {
406         struct c67x00_hcd *c67x00 = sie->private_data;
407         struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
408
409         c67x00_sched_stop_scheduler(c67x00);
410         usb_remove_hcd(hcd);
411         usb_put_hcd(hcd);
412 }